Viewing archive of Friday, 17 February 2006
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2006 Feb 17 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 048 Issued at 2200Z on 17 Feb 2006IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity continues at very low levels. Region 854
(S08W09) and newly numbered Region 855 (N05E15) are both in decay. A
large CME was observed off the northeast limb at approximately
17/0530Z. The CME is not expected to be geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to continue
at very low levels.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet on 18 February. A coronal hole high speed solar
wind stream is expected to rotate into a geoeffective position on 19
February. Unsettled conditions with isolated active periods are
possible on 19 and 20 February.
III. Event Probabilities 18 Feb to 20 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Feb 079 Predicted 18 Feb-20 Feb 080/085/085 90 Day Mean 17 Feb 085
V. Geomagnetic A Indices
Observed Afr/Ap 16 Feb 007/008 Estimated Afr/Ap 17 Feb 005/006 Predicted Afr/Ap 18 Feb-20 Feb 005/005-010/012-008/010
VI. Geomagnetic Activity Probabilities 18 Feb to 20 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 05% | 15% | 15% |
| Major-severe storm | 01% | 05% | 05% |
All times in UTC
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